Door check and closer.



sa Mmmsm DOOR CHECK AND CLOSER APPLICATIOl FlLED JULY 15,19%.

Patented Mar. 12, 1918.

2 SHEETS-SHEE l.

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U TNESSES l "7W M A llarneys P. MIKKELSEN. 'DOOR CHECK AND CLOSER.

APPLICATION FILED JULI/15.1916.

1,259,428. Patented May. 12, 1918.

2 SHEETS-SHEET 2- ww 22 i YY @EMI/M UNITED srnrns PATENT ernten.

:FEDER MIKKELSN, OF STAMFORD, CONNECTICUT, ASSIGNOR TO TI-IE YALE & TOXVNE MANUFACTURING COMPANY, OF STANFORD, CONNECTICUT.

DOOR CHECK AND CLOSER.

Specification of Letters Patent.

Patented Mar. 12, 1918.

Application filed July 15, 1916. Serial N o. 109,470.

'To all whom t may concern:

Be it known that I, FEDER MIKKELSN, a citizen of the United States, and a resident of Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Door Checks and Closers; and I do hereby de clarethe following to be a full, clear, and exact description of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

My invention relates to improvements in door checks and closers of the type where the checking member, as Vfor instance a piston and its surrounding cylinder, is placed within and secured to a casing. It may be that the checking member acts by having the piston pulled away from the cylinder through a proper connection when the door is opened, or the cylinder may be pulled away from the piston, the spring in either case operating to return the member which is pulled away to lits closed position, subject to the checking action of a fluid which is forcedthrough a regulating valve openinO'.

z:Ihe object of my invention is to provide automatic attachment of the checking memvber so that when it is operated through the opening of the door or by the spring on its return, the checking member and its moving parts will automatically be in alinement thus facilitating the action of the check and reducing friction.

With these objects in view my invention consists in the parts and combination of parts and in the details of construction as will be more fully explained and pointed out in the claims.

In the accompanying drawings, Figure l is a top view, aartly in section and partly broken away, of a double acting check and closer embodying my invention; Fig. 2 is a view partly in plan vand partly in section of the piston and end of casing to which the piston is secured; Fig. 3 is a view in vertical section partly in elevation of the parts shown in Fig. 2; Fig. 4 is-a view in section on the line w-m of Fig. 3, the projection on the piston being in elevation; Figs. 5, 6 and 7 are views of the piston, and Figs. 8, 9 and l0 are views of modifications.

8 represents casing to be embedded in the floor below the door, and closed at its Yupper side by cover plates 9 and 10 secured by screws to laterally projecting flanges at the upper open edge of the casing.

lviounted in the casing and cover section l0, adjacent one end of the casing, is the vertical spindle or shaft Il, the lowei` end of which is seated in a socket l2 in the bottom of the casing and is supported near its upper end by a suitable bearing formed in or carried by the section l0 of the cover. The upper end of the spindle l1, which projects above the cover is made angular in cross section and is adapted to enter a correspondingly formed recess in a shoe to be carried by the lower edge of the door.

The spindle or shaft Il is provided with a cam, "preferably of heart shape as shown in dotted lines in Fig. l, and adapted to engage rollers carried by the yoke 13, which is connected with the rod la carrying the cylinder l5.

The cylinder is provided at its outer open end with a peripheral liange 15rL which is engaged by one end of the spring 16, the opposite end of said spring bearing against the stop plate 17 through which the rod 14 passes, the said stop plate being restrained by its Contact with the casing and cover section 10, against movement toward the shaft ll, hence when the shaft is turned as in opening the door, the spring 16 will be compressed or put under tension and operate to close the door when the latter is released.

'Ihe cylinder 15 is mounted and reciprocates on the hollow piston 18, and is provided at its closed end with an inlet port 15b for the passage of the checking liquid rear closed end with a rearwardly extending lug, the latter being preferably integral with the piston. The axis of this lug is vertical and the lug has a curved periphery the central part 18a of which is in the are of a circle, while the parts thereof 18b above and below the central portion are made tapering so that. the central part of the lug constitutes the main bearing. The arc of the lug, is as shown, considerably greater than a half circle, and it rests within a recessed seat 19 formed in the outer end oit the casing 8, the said seat 19 being open at the top and having a restricted opening at the front. This recessed seat is circular in cross section and of a diameter to readily receive the lug, and permit the latter to turn freely therein when seated, but which embraces the lug more than half way around so as to absolutely prevent any movement of thelatter in the direction of the length of the casing. The lug is so shaped that its main bearing is on or near its center, so that it can lift or pivot slightly in a vertical direction, and can of course turn toa limited extent around the axis of the lug, and forms in effect a universal joint. This provides for proper coordination of the piston with its cylinder during the movements of the latter, and avoids the necessity of special care and alinement of parts in assembling, or any loss of friction in the event. the alinement is not perfect. In other words it alines itself with the cylinder as the latter slides back and forth on it.

To prevent the lug from rising out of its seat, a projection 20 isrformed integral with the section 9 of the cover plate, which projection, when the parts are assembled, comes within such distance of the top of the lug as shown, or if preferred, the top of the end of the piston, as to prevent. any undue vertical movement.

The advantage of this construction is that thev alinement of the parts is automatic, and therefore avoids the labor necessary to making alinement accurate, and does away with all screws and other fastenings to hold the parts in place.

I have shown and described the piston having the lug or trunnion engaging means connecting it with the casing, but it is clearly evident that the-cylinder may be so connected, hence I would have it. understood that my invention comprehends the connection of either checking member with the casing.

Again, instead of forming the lug integral with the checking member as previously explained, it may be integral with the casing and the checking member be provided with a block 191 having the recessed seat as shown in Fig. 8, in which event the escape valve 19a would be in the block 19h, at one side of the seat, instead of in the luv, where it is located when the lug is integral with the checking member.

In the construction illustrated in Figs. 9 and 10, I have shown a trunnion 21 tted at its ends in recessed seats in the projections formed respectively on the bottom or end of the casing 8 and the cover plate 9. This trunnion 21 carries a ball 23, which may or may not. be integral with or xed to the trunnion. The checking member 18 is provided with an end projection 24 having a semi-spherical seat for the ball, and a plate 25 having a similarly shaped seat is secured to the projection 24 by screws or otherwise, the two parts forming a spherical seat. for the ball, so that the Whole forms a universal joint and permits the checking member 18 to move in any direction. In this latter form the trunnion 21 also has an endwise movement as well as a rotary movement.

It is also evident that. many slight changes might be resorted to in the relative arrangement of parts shown and described Without departing from the spirit and scope of my invention. Hence I would have it understood that I do not wish to confine myself to the exact construction and arrangement of parts shown and described, but

Having fully described my invention what I claim as new and desire to secure by Letters-Patent, is

1. In a door check and closer, the combination of a casing, a checking member within the casing adapted to be secured against movement, one of said parts provided at one end with an integral recessed seat and the other part provided at its end adjacent said seat with an integral trunnion or journal to enter the seat, whereby said checking member may oscillate in the casing, the checking member having a port terminating adjacent the axis on which said checking member turns, and a door spindle mounted in the casing and connected with said checking member.

2. In a door check and closer, the combination of a casing, a checking member within the casing, one of said parts having an integral recessed seat and the other part a corresponding journal or bearing to enter said seat, the said journal or bearing and its seat constructed to permit of a limited universal movement of the checking member, and a door spindle mounted in the casing and connected with said checking member.

3. In a door check and closer, the com-v at its top and having a restricted opening specification in the presence of two subscribat its front, and the other part having a ing Witnesses.

cylindrical lug at one end to rest Within said recessed seat and a cover plate having a pro- FEDER MIKKELSEN 5 jection adapted to prevent the vertical dis- Witnesses:

placement of said parts. STUART B. AVERY,

In testimony whereof, I have signed this ELWYN G. RoLsToN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Iatentl,

` Washington, D. C. 

